The size of the ridge beam needed to span a 24 foot should be 16 inches deep and 8 inches wide. What size ridge beam do i need for a 24-foot span ![]() In addition, the size of ridge beam needed to span a 12-foot should be 2-2″×12″ lumber, while the size of ridge beam needed to span a 10-foot should be 2-2″×10″ lumber. Likewise, the size of ridge beam needed to span a 18-foot should be 4-2″×12″ lumber, while the size of ridge beam needed to span a 16-foot should be 3-2″×12″ lumber. In general, the size of ridge beam needed to span a 30-foot should be 4-2″×20″ lumber, while the size of ridge beam needed to span a 24-foot should be 4-2″×16″ lumber. For a 30 foot span:- The size of a ridge beam for a 30-foot span need to be 4-2×20 dimensional lumber or wood or 5-1/4″×16″ Glulam or LVL.For a 28 foot span:- The size of a ridge beam for a 28-foot span need to be 4-2×18 dimensional lumber or wood or 5-1/4″×14″ Glulam or LVL.For a 10 foot span:- The size of a ridge beam for a 10-foot span need to be 2-2×10, made of dimensional lumber or wood.For a 12 foot span:- The size of a ridge beam for a 12-foot span need to be 2-2×12, made of dimensional lumber or wood.For a 14 to 16 foot span:- The size of a ridge beam for a 14 to 16-foot span need to be 3-2×12, made of dimensional lumber or wood.For a 18 foot span:- The size of a ridge beam for a 18-foot span need to be 4-2×12, made of dimensional lumber or wood.For a 20 to 22 foot span:- The size of a ridge beam for a 20 to 22-foot span need to be 3-1/2″×14″, made of Glulam or LVL or engineered wood, or 4-2×14 dimensional lumber.For a 24 foot span:- The size of a ridge beam for a 24-foot span need to be 3-1/2″×16″, made of Glulam or LVL or engineered wood or 4-2×16 dimensional lumber.Here’s is the general guideline for ridge beam size and their span for Douglas Fir lumber:. It helps distribute the weight of the roof and prevents sagging or spreading of the walls. ![]() A ridge beam in construction provides support and stability to the roof structure by connecting the tops of opposing roof slopes.
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